package operation;
import book.Book;

import book.BookList;

import java.util.Scanner;


public class DelOperation implements IOPeration{
    public void work(BookList bookList) {
        System.out.println("删除图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要删除图书的书名：");
        int currentSize = bookList.getUsedSize();

        int index = -1;
        String name = scanner.nextLine();
        int i = 0;
        for(;i < currentSize;i++){
            Book tmp = bookList.getBook(i);
            if(tmp.getName().equals(name)) {
                index = i;
                break;//记录下来了 要删除图书的姓名
            }
        }
      if(i >= currentSize){
          System.out.println("没有你要删除的图书");
          return;
      }
      for(int j =index;j < currentSize-1;j++){
          Book book = bookList.getBook(j+1);
          bookList.setBook(book,j);
      }
      bookList.setBook(null,currentSize-1);
      bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功！");

    }
}
